Writing & Executing First C Program

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💻 Writing & Executing First C Program (Hello World)

Let’s create your first C program step-by-step 🎉

🔹 Step 1: Open IDE

Open your compiler/IDE like
👉 Dev-C++ (or any other you installed)

🔹 Step 2: Write the Program ✍️

#include <stdio.h>

int main() {
    printf("Hello, World!");
    return 0;
}

🔹 Step 3: Understand the Code 🧠

  • #include <stdio.h> → For input/output functions
  • int main() → Program starts here
  • printf() → Prints message on screen
  • return 0; → Ends program successfully

🔹 Step 4: Save the File 💾

  • Click File → Save As
  • File name: hello.c
    👉 Important: Use .c extension

🔹 Step 5: Compile the Program ⚙️

  • Click Execute → Compile
  • Or press F9

👉 This checks for errors

🔹 Step 6: Run the Program ▶️

  • Click Execute → Run
  • Or press F10

🔹 Step 7: Output 🎉

Hello, World!

🔹 One Shortcut 🚀

👉 Press F11 → Compile + Run together

🔹 Common Errors ⚠️

  • Missing ; (semicolon)
  • Wrong spelling (printf)
  • File not saved as .c

🔹 Summary 📝

  1. Write code ✍️
  2. Save as .c 💾
  3. Compile ⚙️
  4. Run ▶️
  5. See output 🎉

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